ARM: 7940/1: add support for the Cortex-A12 processor

The A12 behaves as the A7/A15 does with respect to setting the SMP bit, and doesn't require TLB ops broadcasting to be explicitly enabled like the A9 does. Note that as the ACTLR cannot (usually) be written from non-secure, it is the responsibility of the bootloader/firmware to set this bit per core - it is done here in Linux as last resort in case of bad firmware. Acked-by: Catalin Marinas <[email protected]> Acked-by: Will Deacon <[email protected]> Signed-off-by: Jonathan Austin <[email protected]> Signed-off-by: Russell King <[email protected]>
rtvt123 · Feb 10, 2014 · ddb2ff7 · ddb2ff7
1 parent b28a960
commit ddb2ff7
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diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h
@@ -71,6 +71,7 @@
 #define ARM_CPU_PART_CORTEX_A5		0xC050
 #define ARM_CPU_PART_CORTEX_A15		0xC0F0
 #define ARM_CPU_PART_CORTEX_A7		0xC070
+#define ARM_CPU_PART_CORTEX_A12		0xC0D0
 
 #define ARM_CPU_XSCALE_ARCH_MASK	0xe000
 #define ARM_CPU_XSCALE_ARCH_V1		0x2000

diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
@@ -192,6 +192,7 @@ __v7_cr7mp_setup:
 	mov	r10, #(1 << 0)			@ Cache/TLB ops broadcasting
 	b	1f
 __v7_ca7mp_setup:
+__v7_ca12mp_setup:
 __v7_ca15mp_setup:
 	mov	r10, #0
 1:
@@ -483,6 +484,16 @@ __v7_ca7mp_proc_info:
 	__v7_proc __v7_ca7mp_setup
 	.size	__v7_ca7mp_proc_info, . - __v7_ca7mp_proc_info
 
+	/*
+	 * ARM Ltd. Cortex A12 processor.
+	 */
+	.type	__v7_ca12mp_proc_info, #object
+__v7_ca12mp_proc_info:
+	.long	0x410fc0d0
+	.long	0xff0ffff0
+	__v7_proc __v7_ca12mp_setup
+	.size	__v7_ca12mp_proc_info, . - __v7_ca12mp_proc_info
+
 	/*
 	 * ARM Ltd. Cortex A15 processor.
 	 */